package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.Map;
import java.util.concurrent.TimeUnit;

public class LoginInterceptor implements HandlerInterceptor {


//    private StringRedisTemplate stringRedisTemplate;
//
//    public LoginInterceptor(StringRedisTemplate stringRedisTemplate) {
//        this.stringRedisTemplate = stringRedisTemplate;
//    }

//    @Override
//    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        //获取session
//        //HttpSession session = request.getSession();
//        //获取请求头的token
//        String token = request.getHeader("authorization");
//        if (StrUtil.isBlank(token)){
//            //不存在拦截,返回401状态码未授权
//            response.setStatus(401);
//            return false;
//        }
//        //获取session用户
////        Object user = session.getAttribute("user");
//        //基于token获取redis中的用户
//        String key = RedisConstants.LOGIN_USER_KEY + token;
//        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);
//
//        //判断用户是否存在
//        if (userMap.isEmpty()){
//            //不存在拦截,返回401状态码未授权
//            response.setStatus(401);
//            return false;
//        }
//
//        //将查询到的hash数据转为UserDTO对象
//        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
//
//        //存在，保存用户信息到threadlocal
//        //UserHolder.saveUser((UserDTO) user);
//        UserHolder.saveUser(userDTO);
//
//        //刷新token有效期
//        stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
//
//        //放行
//        return true;
//    }
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    //判断是否需要拦截，threadlocal中是否有用户
    if(UserHolder.getUser()==null){
        //没有，需要拦截，设置状态码
        response.setStatus(401);
        //拦截
        return false;
    }
    //有用户放行
    return true;
}

//    @Override
//    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//
//        //移除
//        UserHolder.removeUser();
//    }
}
